1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f92275335ff59fa580700c345d1117ad7984dec845cef0df875f3142037405. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e547c4cf-c343-44eb-adb9-f79c3bb0071a.json and https://artists.proofprofile.net/proofs/artist/e547c4cf-c343-44eb-adb9-f79c3bb0071a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebfdc6aca2393bdd49d4eca3e1f77b3be861511f7cc717b4a84b2945195f7b2. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ022111621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1776d4468783fa180fdc1c7ddaf2a8788b44058b3d65669d2754064c51f4de93. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62128459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29129ebece2fea23893040f77e9c27059f40062865c839560ad1451e5fc56b42. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2201853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e534d2550b4912240375009d65cec0121255b8672af0a0b47b2e719348ac56e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9Z62101108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98348285026efbc7564a1e6958117890d8acb7245cf0cbe92e038e2ec9f9104b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2246314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4586d291883597ca3c12e3be2584c8b8a2cac0130798498cb9c246590147ca52. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2247071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9799f61132c9bce60d0fb8677f9e440e15f218ed95854002e6a79435e0f0706e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ022390847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523bd02260124f363addbdde6ef6b915d5de2d913f3d2748bb6af429dbfc8769. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH7812402283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a3941a98ac5d7d676ba90bc358c54981abfa0ce6645f7aea883c7128652357. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA052494582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed31ca214ca1c47186a020212133eaa650c3f5d710ad30c48277eeee657e0640. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA052494584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fd166cfc5f16db9df53eee00993408fe51773bb4222776987ebe3c96c84bf9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA052494586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fd166cfc5f16db9df53eee00993408fe51773bb4222776987ebe3c96c84bf9. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA052494586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7550434c4d0c7c4884b3184094acd304e8753539565b5caf6c721ac393e675ee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH7812529052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafdeb955adcf32c5fd6171411a1ef830bf9940a978ae4b9b966d56237476c4e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R2529507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d29f8875dd0c15c7a58a4b37584f9fbaf94c54343f52ca5c402c72b6a8d0f97. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH7812541903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d1ff16e3b2872f6d9aa01bf734e1f0455da89472df0d8bb23e8a0b66c94a88. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH7812550214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c28ae6f95939dd4c55cf1aded678795c0a93e8bcb3be4b1dc5231fda7bbc3c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1FB2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b81a9f0fd0f352b8ca6ac06ab038ebf51f859503aa451a34dc89486288b8d5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2286538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa6407ee2afc7d6d2d6b86cec83cc1c12023c24aba35131caa110b25613ce56. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKZGC2400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d35b678495de825a4327e197f409ecf57d156c2339fec241c8a647ece718337. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2189471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfb17edc4d2d39925e5a3162338a043aee137ca82a8b5dfc0532bb4b2ca4f07. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKZGC2304307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cca649139efcd051aea3f9b3b4d386896ba8c79775831b0f5337dc01765fafa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKZGC2304308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a185697636251494a8464277514c2e9cb12626c62d54c54b5a084d3cff6f014. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKZGC2304309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac1590b12818b93cbf802bb2beb8882554c89021f1eaefdadf7a0bc04973b3f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKZGC2304310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6ed2174423161741407b3a9b0deb5795275ae469b91f31ce11e7d04f9a089e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKZGC2304311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007c12f840a1feb9ff9dffe93bf06c2f331f4284e35a902b85ce4a45ae97d376. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2426068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4ea4fee8755faf2e9ed75db74eac5d7117d40152e2d6b1a8fe276ef2f32531. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2297716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d35b678495de825a4327e197f409ecf57d156c2339fec241c8a647ece718337. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2189471.